Panasonic DP-C321, Service Handbook

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Chapter 3 Troubleshooting
3. 4. 4. 16 DC681 Regi Measurement Cycle (Registration)
Function To know the control state of the AC Control (DrumDrive, BeltDrive, BeltSteering, etc),
which is one of the color regi elements, this cycle performs the Color Regi measurement including
the AC element detection.
• Detects the color shift amount using the A1 patch (all colors, IN/OUT). Calculates the average
value (DC element) and difference of the maximum and minimum values (AC element) of
relative color shift amounts compared with Cyan in Fast and Slow Scan directions detected by
each sensor, and set them as the measurement results. Displays those Regi measurement
results. Correction is not performed.
• Overview of Regi Measurement
Reference Execution Time: Approx. 15 sec.
Procedure
1. Select "Registration" tab on the Service Mode screen.
2. Select [
DC681 ] on the Registration screen.
3. The Regi Measurement Cycle screen is displayed.
4. Select [Execute].
5. In [Judgement],
OK is displayed: Complete
NG is displayed: Check the following causes and execute DC681 again.
Causes of Error
• Sensor: Improper installation, failure
• Pattern: Density insufficient, Belt scratched
• Frame: Distortion
If the result is NG again, refer to FIP to repair the trouble.
6. Select [Close] to return to the Registration screen.
Displayed Data
Display
Range
Unit Remarks
Lateral DC misregistration (IN/OUT) -500~+500 micron Target Colors = Y, M, K
Lateral AC misregistration (IN/OUT) -500~+500 micron Target Colors = Y, M, K
Process DC misregistration (IN/OUT) -500~+500 micron Target Colors = Y, M, K
Process AC misregistration (IN/OUT) -500~+500 micron Target Colors = Y, M, K
Number of Patterns detected (IN/OUT) 0~24 Block
The cause of error display is shown below.
• Sensor: Improper installation, failure
• Pattern: Density insufficient, Belt scratched
• Frame: Distortion